sound; noise; acoustics; reverberation; echo; audio
labour shortage; labor shortage; shortage of workers; shortage of hands
person in charge (of an area of work); person responsible; contact (person)
(sound of an) explosion or detonation; roar (of a machine)
take this opportunity (to apologize, thank, explain, etc.)
studying for a test (esp. school or university entrance examinations)
route; course; path; one's future course (e.g. after graduating high school)
benefit; use; good; profit; gains
to investigate thoroughly; to examine closely; to probe into; to be obsessed with a thought; to brood over; to worry about
to oppress; to persecute; to tyrannize
in conflict; incompatible; out of harmony; running counter; mutually exclusive; clashing with
inconsistency; discord; conflict; discrepancy; contradiction; failure
freely; at liberty; at will; as one likes
origin; source; beginning; starting point
craving; longing; thirsting
to remonstrate; to admonish (someone) for; to advise (someone) not to; to warn against
to toady; to be obsequious
narrow-minded; obstinate; stubborn; perverse; unreasonable; warped
artificial intelligence; AI
substitution; alternation; alternative; substitute
bound hand and foot; hedged in (e.g. by restrictions); immobile
senility; senile decay; infirmity (through age)
abundant; plentiful; rich; wealthy; open (mind); relaxed
to scheme; to plan; to play a trick; to invent; to conspire; to frame up
to strangle; to constrict
to stop (an activity); to cease; to discontinue; to cancel; to abandon; to give up
key person; important person
suffering; distress; hardship; trial
to be effective; to be fruitful; to be worthwhile; to be worth; to be rewarded; to pay off
mishmash; miscellany; medley; jumble; mixture; odds and ends
unforeseen; unexpected; sudden; accidental
absurd; unreasonable; excessive; very; extremely; excessively
stagnation; hindrance; delay
to joke around; to do and say ridiculous things
human nature; human heart; public feeling; people's sentiments; consciousness; awareness
to tie one on; to get drunk
tidying up; clearing up; cleaning up; clearing away; putting in order
step; stair; grade; rank; counter for breaks in written language (or speech, etc.); dan